Horace wyman



H. WYMAN. HARNESS LBVELING DEVIGEPOR LOOMS.

No Model.)

Patented Feb. 22, 1898.

Non-599,675.

' UNITED STATES PATENT OFFICE.

HORACE WYMAN, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO THE CROMPTON 8c KNOWLES LOOM WORKS, OF SAME PLACE.

HARNESS-LEVELING DEVICE FOR LOOMS.

SPECIFICATION forming part of Letters Patent N 0. 599,675 dated February 22, 1898. Application filed December 13, 1895. Serial No. 572,512. (No model.)

To aZZ whom it may concern.-

Be it known that I, HORACE WYMAN, of Worcester, county of Worcester, State of Massachusetts, have invented an Improvement in Harness-Leveling Devices for Looms,of which the following description, in connection with the accompanying drawings, is a specification, like letters and numerals on the drawings representing like parts.

This invention in looms has for its object to provide improved mechanism for imparting to the lifters or depressors or, as they are sometimes termed, knives, of a dobby or Jacquard mechanism or fancy harness mechanism a movement independent of the movement of the same by the usual harness-shifting devices for the purpose of changing the relative positions of the said knivesfor leveling the harness to enable the operator to more easily get at the loose or broken threads for adjustment or repair.

In the drawings I have illustrated my invention in connection with a dobby such'as shown and described in Letters Patent No. 336,683, dated February 23, 1886, though I desire it to be understood that my said invention is not limited in its application to this or anyother particular dobby or mechanism.

In the drawings, Figure 1 is a side elevation of a mechanism embodying my in'ven tion; Fig. 2, a vertical longitudinal section thereof, and Fig. 3 a detail showing the jointed connection as collapsed for evening.

In the particular embodiment of my invention selected for illustration and shown in the drawings the frame A, the harness-levers the connectors f stops 23 24,, lifters t 5 the hooked jacks d and c jointed to the con-' nectors f", the grids o 0. shaft 0 the pattern chain or surface (i and the levers a, provided at their front ends with toes 2, are and may be of suitable or desired constructionsuch, for instance, as shown and described in my said Letters Patent No. 336, 683, the said parts operating as therein fully described.

In this my present invention, as illustrated in the drawings, one of the lifters-as, for instance, s -may be connected by a link 85X with a suitable actuator h, shown as a lever fulcrumed upon a shaft h, mounted in the frame and actuated in the present instance by a rod 773. At its end opposite the link 85X the said actuator h is connected with the other lifter or blade 25 through the medium of a jointed connection, constituting the principal part of my invention, said connection, as herein shown, consisting of the two members m n, the former of which is jointed at m to the actuator h, the latter being herein shown as hooked at its end to engage a suitable eye in the extended end of the lifter, the said members an and n, as shown, being jointed together at their adjacent ends, as indicated at n.

A spring 01 connected with one of the members-as, for instance, the member -n-and at its opposite end with a suitable support, as the lower end of the actuator h, tends constantly to hold the two members in their horizontal extended positions, Fig. 1, said members being provided with suitable stop-surfaces 'n and m to limit the spring-actuated movement of the members and give to the latter the firmness and rigidity which are necessary when in the position shown to enable the lifter to be reciprocated by the vibrations of the actuator h in amanner well understood to those conversant with the art.

One of the members, as m, is shown provided with a verticallyextended arm m provided, it may be, with a suitable handle m and which is preferably connected by a cross-bar m with the vertical arm of the corresponding member of the jointed connection at the opposite side of the loom.

In the normal operation of the loom with the parts as in Fig. 1 the lifters will be vibrated and will engage the hooked jacks and vibrate the harness-levers h according as the pattern-surface 61 may determine.

If it should be desired to stop the loom for access to and to mend a broken warp-thread, the loom will be stopped in its position, substantially as shown in Fig. 1, with the upper lifter at or near its extreme outermost posi-, tion. The operator, by means of the handle m now throws the said handle over into its.

dotted position, Fig. 1, thereby breaking the joint and collapsing the connection, drawing the lifter t movement of which is also assisted by the weight of the levers of the harinto its dotted position, Fig. 1, nearly or quite over the lower lifter 8 such movement of the lifter i dropping the harness-levers connected with it into the same plane as those controlled by the lower lifter. This brings all the harnesses and their warps into substantially the same plane, where they are easily accessible to the operator for repairing, &c. \Vhen the loom is started, the inward movement of the parts turns the lever h on its pivot h from its full-line position, Fig. 1, and since the lifter t was already in its extreme position at the left the movement of the upper end of the lever-actuator h away from it acts to automatically straighten the jointed or toggle connection again into its full-line position, Fig. 1, so that the next time the upper end of the lever moves to the right it will push before it the lifter 75 said jointed connection thereafter remaining in its extended and rigid position until again broken by the operator, as before described.

My invention is not limited to the particular construction herein shown and described, for the same maybe varied within the spirit and scope of the invention.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In an apparatus of the class described,

the combination with the lifter and its actuator, of the jointed connection secured at one end to the knife and at the other end to the actuator, a spring connected with the actuator and tending to hold said connection in its extended operative position, and a stop to limit such spring-actuated movement, substantially as described.

2. In a (lobby-loom, an actuator, a knife and two sets of jointed connections between said actuator and knife, said jointed connections being positively connected to be operated simultaneously one by the other, substantially as described.

3. In a dobby-loom, an actuator, a knife, two sets of jointed connections between said actuator and knife, said connections having each an angular member, the angular members of the two connections being joined one to the other for simultaneous operation of both connections, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HORACE \VYMAN.

Witnesses:

FREDERICK L. EMERY, GEO. XV. GREGORY. 

